Potential

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Potential Kinetic Energy
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Essential QuestionHow are potential kinetic
energy related?

• Standard
• S8P2b. Explain the relationship between potential
  and kinetic energy.

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ConceptAttainmentActivity

• see resources

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Use the Kinetic Potential Energy Graphic
Organizer to take notes.
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What is energy?

• Energy is the ability to cause change.
• Everything around you has energy, but you notice
  it only when a change takes place.
• Anytime a change occurs, energy is transferred
  from one object to another.

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Explain how these objects cause change
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Things that move can cause change. For example, a
bowling ball rolls down the alley and knocks down
some pins. Is energy involved?
A change occurs when the pins fall over. The
bowling ball causes this change, so the bowling
ball has energy.
As the ball moves, it has a form of energy called
kinetic energy.
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Kinetic Energy

• Kinetic energy is the energy an object has due to
  its motion. If an object isnt moving, it doesnt
  have kinetic energy.

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Kinetic Energy and Speed

• Lets use our bowling ball example. If you roll
  the bowling ball so it moves faster, what happens
  when it hits the pins?
• A faster ball causes more change to occur than a
  ball that is moving slowly.
• Kinetic energy increases as an object moves
  faster.

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Kinetic Energy Mass

• Suppose you roll a volleyball down the alley
  instead of a bowling ball. If the volleyball
  travels at the same speed as a bowling ball, do
  you think it will send pins flying as far?
• An important difference between the volleyball
  and the bowling ball is that the volleyball has
  less mass. Even though the volleyball is moving
  at the same speed, it has less kinetic energy
  because is has less mass.
• Kinetic energy increases as the mass of an object
  increases.

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The Basics of Kinetic Energy

• Kinetic Energy is the energy of motion.
• Kinetic energy increases as an object moves
  faster.
• Kinetic energy increases as the mass of an object
  increases.

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What if the bowling ball is not moving? Does it
still have energy?
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PotentialEnergy

• Potential energy is the energy stored in an
  object because of its position. It has the
  potential to cause change.

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Potential Energy

• Imagine our bowling ball is sitting on a table.
  It has Potential Energy as it sits on the table
  because it has the ability to cause change.
• What happens if the bowling ball falls off the
  table?

Potential Energy changes to Kinetic Energy
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Potential Energy

• What happens to the Potential Energy of the
  bowling ball if the table is higher?

The Potential Energy of an object is greater if
the position of the object is higher. The object
has the potential to cause more change.
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Potential Energy

• How does mass affect the Potential Energy of an
  object?

The more mass an object has, the more potential
energy it has because it has the potential to
cause more change.
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The Basics of Potential Energy

• Potential Energy is stored energy.
• Potential Energy is greater if the position of an
  object is higher.
• Potential energy increases as the mass of an
  object increases.

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Changing Kinetic Energy Potential Energy
Activity
Use the QR Code activity to introduce the
relationship between kinetic energy and potential
energy if possible. Otherwise, use the slides
with animations to demonstrate the concepts.
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Changing Kinetic Potential Energy

• In a previous slide, we discussed how the
  potential energy of an object can change to
  kinetic energy.
• For example, when you are holding the bowling
  ball, it has potential energy. As you release the
  ball, most of its energy is kinetic. However, as
  the ball begins to slow its kinetic energy
  decreases. But, the total energy of the ball
  hasnt changed.
• The decrease in kinetic energy equals the
  increase in potential energy. The total amount of
  energy remains constant.

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Changing Kinetic Potential Energy
http//www.classzone.com/books/ml_science_share/vi
s_sim/mem05_pg69_potential/mem05_pg69_potential.ht
ml
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Changing Kinetic Potential Energy
http//www.physicsclassroom.com/mmedia/energy/ce.c
fm
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Changing Kinetic Potential Energy
http//www.physicsclassroom.com/mmedia/energy/ie.c
fm
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Changing Kinetic Potential Energy
KE Kinetic Energy PE Potential Energy W
Work TME Time
http//www.physicsclassroom.com/mmedia/energy/se.c
fm
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Changing Kinetic Potential Energy
Shooting a Dart
http//www.physicsclassroom.com/mmedia/energy/dg.c
fm
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Changing Kinetic Potential Energy
Pendulum
http//www.physicsclassroom.com/mmedia/energy/pe.c
fm
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Changing Kinetic Potential Energy
http//www.physicsclassroom.com/mmedia/energy/hw.c
fm
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Changing Kinetic Potential Energy
http//www.physicsclassroom.com/mmedia/energy/hh.c
fm
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Changing Kinetic Potential Energy
http//www.classzone.com/books/ml_science_share/vi
s_sim/mfm05_pg126_coaster/mfm05_pg126_coaster.html

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(No Transcript)
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Watch the video clip of the cartoon Road Runner.
Identify at least two examples of Kinetic Energy
and two examples of Potential Energy
http//www.youtube.com/watch?v8H41zbqrwVo
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Other Suggested Activities

• Trill Ride Activity, Spool Racer, or Button
  Whizzer
• Kinetic Potential Energy Images
• Science of NHL Hockey

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Summarizing Strategy